Underprep
A 79-year-old woman with osteoporosis has a lower RPD, which becomes loose when #29 was extracted a few months earlier. The tooth #22 has mobility II (Fig.2 (increased pdl)), while the tooth #27 is short with periapical radiolucency (Fig.1,3 ^). The latter needs RCT and crown. For #29 implant placement, osteotomy should be underprep: 2 mm drill for 12 mm for 10 mm long implant (2 mm gingiva), 2.7 mm for 8 mm (Fig.3,4 (low bone density)).
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Lower Premolar Immediate
Implant, IBS
Xin Wei, DDS, PhD, MS 1st edition 06/23/2017, last revision 06/23/2017